EP3774097A1 - Procédé d'élimination de boues de forage de puits en excès - Google Patents

Procédé d'élimination de boues de forage de puits en excès

Info

Publication number
EP3774097A1
EP3774097A1 EP19781307.4A EP19781307A EP3774097A1 EP 3774097 A1 EP3774097 A1 EP 3774097A1 EP 19781307 A EP19781307 A EP 19781307A EP 3774097 A1 EP3774097 A1 EP 3774097A1
Authority
EP
European Patent Office
Prior art keywords
sludge
drilling
drilling sludge
amount
disposal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19781307.4A
Other languages
German (de)
English (en)
Other versions
EP3774097A4 (fr
Inventor
Mikhail Ivanovich Serdyuk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3774097A1 publication Critical patent/EP3774097A1/fr
Publication of EP3774097A4 publication Critical patent/EP3774097A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/08—Reclamation of contaminated soil chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/068—Arrangements for treating drilling fluids outside the borehole using chemical treatment

Definitions

  • the invention relates to neutralization of drilling wastes and can be used for disposal of drill cutting wastes when drilling deep wells of various purpose.
  • a method for disposal of well drilling wastes is known from RF Patent for Invention No. 2213121, said method comprising sludge pit reclamation, including evacuating the liquid phase of waste drilling fluid from the pit, eliminating the fluidity of its coagulates, filling the remaining drilling wastes with mineral soil, and land planning.
  • sludge pit reclamation including evacuating the liquid phase of waste drilling fluid from the pit, eliminating the fluidity of its coagulates, filling the remaining drilling wastes with mineral soil, and land planning.
  • contaminant concentrations are determined in waste drilling fluid, and the content of contaminants in the fluid is brought to levels below maximum allowable concentrations.
  • the evacuation is performed by releasing the liquid phase through a sludge pit dike opening.
  • a method for drilling sludge neutralization from RF Patent for Invention No. 2541957 comprising reception of drilling sludge from the ditch line of a drilling rig or downstream of the vibrating screens of a central hydrocyclone cleaning system from the screw conveyor of a drilling rig, preparation for drilling sludge neutralization/processing, preparation of chemical solutions for dewatering and neutralization of drilling sludge, drilling sludge mixing with chemicals, and injection (with simultaneous stirring) of a neutralizing and encapsulating compound, coagulant and flocculant into the drilling sludge in reactors connected in series for "maturation" before dewatering. Then the drilling sludge is dewatered on a chamber press filter or belt press filters, and the filtrate is cleaned with subsequent re-use of the neutralized drilling sludge.
  • a method for disposal of well drilling wastes is also known from RF Patent for Invention No. 2392256.
  • the method includes separation of drilling sludge from the drilling fluid circulating in the drilling process, and storage of drilling sludge in sludge pits.
  • the drilling sludge is processed into a sludge semi-product which is supplemented with humic mineral concentrate as a composite mixture modifier, and the territories of all soil excavations for placement of neutralized drilling products are returned into land circulation.
  • Sludge pits are constructed as several temporary operative parallel pits, each of them receiving sludge from drilling of different rock strata alternately penetrated by a drilling tool.
  • a process station in the form of several parallel basins is provided to obtain an end product, and ameliorant maturation is arranged in each of them on a rotating basis.
  • a disadvantage of this analog consists in an increase of exposed disturbed lands needed for arrangement of several earth drilling pits, i.e. efforts toward rehabilitation of contaminated territories lead to even greater disturbed areas where earth pits, basins, sumps, etc. are provided for storage and further maturation of drilling sludges, more precisely, their substances. And, despite the fact that it is planned to temporarily occupy these work areas for cleaning and treatment of sludges, the time of such actions may, however, significantly extend for various reasons - climatic, financial, organizational ones (insufficient quantity of additional chemicals because it is necessary to treat the constructed pits themselves as well, rehabilitate them and return them into land circulation).
  • the closest analog of the claimed invention is the waste drilling sludge disposal method (RF Patent for Invention No. 2486166) which includes the preparation of a process area, collection, excavation and delivery of oil-contaminated soils to the process area, preparation of oil-contaminated soil, application of a humic mineral complex and provision of oil-contaminated soil biostructuring processes.
  • the method for waste drilling sludge neutralization includes liming, chemical coagulation, application of flocculants and a humic mineral complex, step-by-step removal of drilling sludge to a buffer layer with laying of drilling sludge to a maximum layer of 8-10 cm, drying of drilling sludge, and stockpiling for further disposal.
  • the humic mineral complex is obtained in the course of low-temperature mechanochemical extraction of humic acids by disintegration of brown coal in a disperser with mixing of the crushed brown coal with alkali.
  • a disadvantage of the closest analog consists in the lack of the guaranteed high- quality treatment of the entire drilling sludge volume contained in a sludge pit, without exception, in any part of it— in the corners, on the bottom, etc., both to a sufficient degree of chemical treatment with reagents and a sufficient degree of mechanical mixing, with regard to both duration and intensity, avoiding undermixed areas in any segment of the sludge pit.
  • the object of the invention is to ensure improvement in the quality of treated drilling sludge disposal and formation of a product with concentrations lower that maximum allowable values by eliminating "dead areas" (insufficiently processed areas in the bulk of the treated drilling sludge) at each stage of sludge neutralization, as well as by finding optimum conditions with regard to the time of contact between the treated sludge and chemicals and to the quantitative ratios of the chemicals and sludge.
  • the waste well-drilling sludge disposal method provides for drilling sludge separation from drilling fluid and drilling sludge discharge into a sludge pit, inside which a cell-type separation metal fixture is installed in the form of vertically oriented bottomless cells to ensure capability for further individual batchwise chemical and technological action on drilling sludge in each of the cells, at first, by destabilizing the colloid system by addition of ferric sulfate in the amount of about 1-3 % of the total drilling sludge weight until visible mass liquefaction and uniform structure formation, then by absorbing the obtained mass by addition of expanded vermiculite in the amount of about 1 % of the total drilling sludge weight, and, finally, by adding humic acids in the amount of about 1 % of the total drilling sludge weight; in this regard, the chemical and technological action - destabilization, absorbtion and addition of humic acids - is applied with constant stirring at a rate of about 30-60 revolutions per minute within approximately 30-60
  • ferric sulfate is used in the form of crystalline hydrate Fe 2 (S0 4 ) 3 -7H 2 0.
  • ferric sulfate is used in the form of crystalline hydrate Fe2(S04)3 9H20.
  • the technical result of the claimed invention is achieved by introducing a new operation that has an influence on the rest of the chemical and technological process of drilling sludge treatment, from the beginning to the very end.
  • Introducing the division of the whole drilling sludge mass to be treated into equal, convenient areas and portions taking into account the overall dimensions of the operated equipment - mixers, agitators, etc., their work zone sweep diameter and with elimination of "dead areas" during stirring, where agitators have been previously unable to cover all processed material of the sludge pit as a whole, with calculation of minimally required, but sufficient quantity of chemicals) eliminates unreacted areas in the treated sludge mass, while making the treatment process (including chemical action aspects) high-quality, cost-efficient and maximally profitable.
  • the division of the sludge pit throughout the volume into equal parts in the form of a cellular structure with vertically oriented cells is provided using a prepared strong working metal fixture installed to provide a capability of dismantling after the treatment of the whole processed sludge mass is finished, ensuring easy removal of the cells which are bottomless like molds.
  • the introduced first (before the beginning of any chemical and even mechanical actions) operation of the formation of the cells dividing the whole treated mass into the parts which thus become more easily and thoroughly treatable in both mechanical and chemical ways until the full completion of each of the operations at all stages, as well as with visual check of each area of the treated mass, allows, if necessary, some correction of time or quantity of interacting materials due to the additional time needed, for example, in case of rock stratum complication in the course of well drilling.
  • the optimally selected and checked mode of action at each of the stages within 30-60 minutes and the chemical ratios presented in the essence of the invention provide guaranteed quality up to the achievement of values below maximum allowable concentrations.
  • the gray mossy color of the drilling sludge changes to the rusty red one.
  • This is a kind of a reference mark indicating a degree in which the treated material in a cell is ready for the next stage (absorption with expanded vermiculite).
  • ferric sulfate visible mass liquefaction is observed along with uniform structure formation.
  • the color of the product in cells also changes - toward the black color gamma.
  • the technical result of the claimed drilling sludge disposal method providing capability for the visual check of readiness to the next stage of processing the drilling sludge, which undergoes changes in the course of treatment, makes it possible to eliminate the unnecessary action time and save the resources spent.
  • eliminating the excess of chemicals and changing the action time at each of the stages prevent from drilling sludge treatment quality deterioration due to more thorough, batchwise treatment of each fragment of the whole material mass through division into cells. Due to the modern technological infrastructure, such as the equipment of wells, conventional computer equipment and a conventional controller, along with the measures recommended in the claimed patent, this method corresponds to the high level of the claimed technical solution in this area and is suitable for industrial use with significant saving of costs.
  • the method is implemented as follows.
  • Drilling sludge is separated from drilling fluid. Based on the sludge pit design, the necessary quantity of cells is calculated.
  • drilling sludge The disposal of drilling sludge is based on sequential addition of various chemicals into it with their thorough stirring using a stirring device.
  • the technological process of drilling sludge disposal is the same in each cell.
  • coagulant (ferric sulfate) is added into the drilling sludge (the cell volume is filled with the sludge by 80 %) in the amount of about 1-3 % of the total drilling sludge weight in order to destabilize the colloid system.
  • the drilling sludge is mixed with the coagulant using a stirring device, for example, an agitator.
  • the calculated amount of ferric sulfate is weighed/dosed and delivered to a cell with an activated agitator; then the calculated amount is filled into the cell.
  • the stirring time is generally about 30-60 minutes.
  • the agitator rotation speed is about 30-60 rpm.
  • ferric sulfate is used in the form of crystalline hydrate Fe 2 (S0 4 ) 3 -7H 2 0 or Fe 2 (S0 4 ) 3 -9H 2 0.
  • the liberated ion neutralizes the excess of OH groups in the drilling sludge until neutral pH is reached.
  • ferric iron ions are hydrolyzed to hydroxide Fe(OH) 3 which is then, as water evaporates, transforms, respectively, into ferric oxide:
  • the formed ferric oxide absorbs organic substances and reduces drilling sludge toxicity.
  • alumosilicate expanded vermiculite
  • ferric sulfate for absorption in the amount of about 1 % of the total drilling sludge weight.
  • the stirring time is about 30-60 minutes.
  • the agitator rotation speed is about 30-60 rpm.
  • the end of stirring is checked visually by formation of the uniform mass structure with inclusions of small blobs.
  • V - formation (synthesis) of polymineral aluminosilicate newgrowths with binding properties which is caused by spontaneous optimization of the ratio and composition of products in liquid-phase chemical reactions.
  • humic acids in the amount of about 1% of the initial total drilling sludge weight.
  • the humic acids are purchased by contractors in a ready-to-use powdered form.
  • the stirring time is about 30-60 minutes.
  • the agitator rotation speed is about 30-60 rpm.
  • the chemical mechanism behind the neutralization of the obtained mass after addition of humic acids consists in interaction between metals and these acids with formation of water-insoluble humates of heavy metals.
  • the physical and chemical fundamentals of interaction of humic acids with heavy metals and organic compounds include the simultaneous processes of ion exchange, adsorption and absorption, co-coagulation and occlusion that ensure efficient remediation.
  • a product is formed at the end of this stage. After it is obtained from cells, a composited sample is taken and prepared in compliance with regulatory documents. This sample is analyzed for compliance with the existing requirements. If the sample complies with them, the product remaining in the sludge pit is mixed with the soil produced as a result of sludge pit excavation at the product/soil ratio of 1:1. The result is a soil/sludge mixture. If the sample does not comply with the existing standards, the process of treatment with the humic mineral component is continued until the product with concentrations not higher than maximum allowable values is obtained.
  • the special fixture bottomless cells
  • the side waterproofing layer of the sludge pit is also dismantled and removed from the sludge pit.
  • the product is mixed with soil using construction machinery, such as bulldozers, excavating machines, etc.
  • a moist soil/sludge mixture is formed as a result of mixing.
  • the end of the technological process is visually checked by the formation of the uniform and evenly colored mixture.
  • the dry soil/sludge mixture is produced from the moist soil/sludge mixture as a result of natural processes of water evaporation within 10-20 days at ambient temperature within 20-25 °C and normal air humidity.
  • the obtained dry soil/sludge mixture is used as man-made soil for sludge pit backfilling on site in the field with levelling of the terrain.
  • the dry soil/sludge mixture is flattened using special machinery, and the top soil removed when the sludge pit was excavated is replaced; it is subsequently sown with herbs, planted with trees and shrubs and returned to the agricultural use.
  • a stirring device is installed and fastened on a 2 c 2 c 2.5 m cell in the following order: the cell cover is lifted, an agitator is installed into an opening in the center of the cover, and then it is lowered into drilling sludge while closing the cover.
  • Stirring is performed, for example, by an agitator with two propeller-type blades located perpendicular to each other and providing the counter-stirring of drilling sludge.
  • stirring device There may be more than one stirring device, depending on the required drilling sludge disposal rate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Geology (AREA)
  • Soil Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Pest Control & Pesticides (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne la neutralisation de déchets de forage et peut être utilisée pour l'élimination de déchets de déblais de forage. Le procédé d'élimination de boues de forage de puits comprend la séparation de boues de forage à partir d'un fluide de forage et l'évacuation des boues de forage dans une fosse à boues. Un appareil métallique de séparation de type à cellules est installé à l'intérieur de la fosse à boues sous la forme de cellules orientées verticalement pour assurer la capacité d'une autre action chimique et technologique discontinue individuelle sur des boues de forage dans chacune des cellules. En premier lieu, le système colloïdal est déstabilisé par addition de sulfate ferrique à hauteur d'environ 1 à 3 % du poids total des boues de forage jusqu'à la liquéfaction de la masse visible et la formation d'une structure uniforme. Ensuite, la masse obtenue est absorbée par addition de vermiculite expansée à hauteur d'environ 1 %. L'action est terminée par l'ajout d'acides humiques à hauteur d'environ 1 % du poids total des boues de forage. Le procédé est mis en œuvre sous agitation constante à une vitesse d'environ 30 à 60 tours par minute pendant environ 30 à 60 minutes dans chacune des opérations mentionnées, et des paramètres significatifs sont vérifiés avec la détermination de la classe de dangers du produit obtenu dans le processus de réalisation des actions. Ensuite, l'appareil métallique est retiré de la fosse à boues, et le sol est ajouté dans la quantité nécessaire pour que le produit obtenu atteigne des concentrations inférieures à des valeurs admissibles maximales. L'invention permet de garantir une qualité d'élimination élevée, tout en permettant d'éliminer le temps d'action inutile et d'économiser les ressources dépensées.
EP19781307.4A 2018-04-03 2019-04-01 Procédé d'élimination de boues de forage de puits en excès Withdrawn EP3774097A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2018111794A RU2678141C1 (ru) 2018-04-03 2018-04-03 Способ утилизации отработанного бурового шлама скважин
PCT/RU2019/000207 WO2019194706A1 (fr) 2018-04-03 2019-04-01 Procédé d'élimination de boues de forage de puits en excès

Publications (2)

Publication Number Publication Date
EP3774097A1 true EP3774097A1 (fr) 2021-02-17
EP3774097A4 EP3774097A4 (fr) 2021-06-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19781307.4A Withdrawn EP3774097A4 (fr) 2018-04-03 2019-04-01 Procédé d'élimination de boues de forage de puits en excès

Country Status (4)

Country Link
EP (1) EP3774097A4 (fr)
EA (1) EA037880B1 (fr)
RU (1) RU2678141C1 (fr)
WO (1) WO2019194706A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2678141C1 (ru) * 2018-04-03 2019-01-23 Михаил Иванович Сердюк Способ утилизации отработанного бурового шлама скважин

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4518503B2 (ja) * 2006-08-30 2010-08-04 ケミカルグラウト株式会社 汚染土壌浄化工法
US8100198B2 (en) * 2007-03-23 2012-01-24 M-I L.L.C. Cuttings treatment and reuse
RU2392256C1 (ru) * 2008-12-01 2010-06-20 Анна Витальевна Бородай Способ обезвреживания отходов бурения нефтяных и газовых скважин
RU2425815C1 (ru) * 2010-07-05 2011-08-10 Общество с ограниченной ответственностью Научно-производственное предприятие "Союзгазтехнология" Способ утилизации отходов бурения скважин
RU2539470C1 (ru) * 2013-09-16 2015-01-20 Открытое акционерное общество "Самотлорнефтегаз" Способ рекультивации бурового шламового амбара
CN205422596U (zh) * 2016-03-24 2016-08-03 巴州纯源科技有限责任公司 一种钻井废弃泥浆处理的化学处理罐
CN105950165B (zh) * 2016-05-11 2019-08-09 山东省农业科学院农业资源与环境研究所 一种铬污染土壤修复改良剂及其修复方法
CN107363088A (zh) * 2016-05-13 2017-11-21 南京凯杰环境技术有限公司 一种土壤固化、不溶化清洁处理方法
RU2678141C1 (ru) * 2018-04-03 2019-01-23 Михаил Иванович Сердюк Способ утилизации отработанного бурового шлама скважин

Also Published As

Publication number Publication date
EA202092081A1 (ru) 2020-11-17
RU2678141C1 (ru) 2019-01-23
EA037880B1 (ru) 2021-05-31
WO2019194706A1 (fr) 2019-10-10
EP3774097A4 (fr) 2021-06-23

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